In the comparison of TB vs. CK, 38 differential metabolites were significantly enriched via eight pathways (p < 0.05), and most of them were related to lipid metabolism pathways, like glycerophospholipid metabolism, phospholipase D signaling pathway, aldosterone synthesis and secretion, arginine and proline metabolism, and ABC transporters (Figure 7 and Figure 8). The gene discussed is ABCG2; the disease is tuberculosis.